Improvement in the process of preparing cream



may be varied as desired.

UNITED STATES PATENT OFFICE.

CHARLES 'D. BIRDSEYE, or NEW YORK, N. Y.

IMPROVEMENT IN THE PROCES OF PREPARING CREAM.

Specification forming part of Letters Patent No. 7,644, dated September 17,1850.

To all whom itmay concerma Be it known that I, CHAS. DENISON B1RDS-.

EYE, of the eity,'lcount v, and State of New York, hav u invented a new Composition called Cream-Sugar, being an improved method for preserving all the flavor and valuable nutricious qualities of milk for a great length of time in a convenient and portable form for use.

The nature of my invention and improvement consists in placing a quantity 'of pure 'milk in a vessel which is placed in a vapor bath, said vessel having a'close cover with a pipe attached, which shall convey the steam and flavor arising from the evaporation of the milk through another vessel containing sugar, thereby preserving the pure flavor of the milk, the evaporation to be continued until the quantity is reduced about one-half, when the sugar is to be mixed in the milk and the evaporation continued in an open vessel (the same being constantly stirred) until the whole-becomes granulated, when it is dried sufficient to be reduced to a powder. 'Theguantity of the sugar The sugar which has absorbed and holds the flavor of the milk will still retain that flavor when it is united with thus )artially evaporated; and during the slight evaporation necessary to complete the process little or none of the flavor will pass ofi, being held by its thorough union with the saccharine matter. 1

e remainder of the milk, which'has been Sugar may be mixed with milk in the first place and the whole evaporated to a solid; but the'resnlt will be an article far inferior in flavor and quality to that made-by the process I have specified, besides the process of evaporation would be so slow as to be entirely impracticable in the manufacture of an article for general use, as time and fuel would form very important items in the expense, and abundant experience has proved that the article is not so good. -This process has the advantage of rapid evaporation of the milk till it is con- The process described herein of distilling.

milk and condensing the same in sugar for the purpose of pres'ervin g the flavor, as set forth.

CHARLES DENISON BIRDSEYE.

In presence -ot--- B. D. CLARK, A. M. O TTER. 

